TWI749545B - Release type electromagnetic trip device - Google Patents

Abstract

A release type electromagnetic trip device (1) includes: a frame (10); a lever (20); a first latch (30); a reset button unit (40); a second latch (50); and an electromagnetic solenoid (60). The lever (20) is biased in a direction for acting on an opening and closing mechanism of a circuit breaker, and is rotatably supported by the frame (10). The reset button unit (40) is biased in a first direction in which it protrudes from the frame (10). The second latch (50) rotates the lever (20) to bring the lever (20) into engagement with the operation lever (20) when the reset button unit (40) in a state of protruding from the frame (10) is pressed in a direction opposite to the first direction. In an engagement state in which the lever (20) is engaged with the first latch (30) and the second latch (50), the electromagnetic solenoid (60) rotates the first latch (30) and the second latch (50) by a plunger (61) to release the engagement state.

Description

Release type electromagnetic trip device

The present invention relates to a release type electromagnetic trip device used in circuit breakers such as air circuit breakers.

Conventionally, as a trip device arranged in a circuit breaker such as an air circuit breaker, there is known a release type electromagnetic trip device that operates when an abnormal current is detected. When an abnormal current is detected in the circuit breaker, the release type electromagnetic trip device changes from the initial state to the released state, thereby turning the circuit breaker into an off state.

A reset button is provided in the release type electromagnetic trip device. The reset button protrudes from the release electromagnetic trip device when the release electromagnetic trip device changes from the initial state to the release state. By pressing the reset button, the release type electromagnetic trip device is reset, so that the release type electromagnetic trip device returns to the initial state from the released state.

[Prior Technical Literature] [Patent Literature]

Patent Document 1: Japanese Unexamined Publication No. 2-31044

However, in the above-mentioned conventional technology, when the reset button is continuously pressed, the reset operation is preferentially performed. Therefore, when an abnormal current is detected in a state where the reset button is continuously pressed, the release type electromagnetic trip device will not be converted to the released state, and the circuit breaker will not be turned off.

The present invention was developed in view of the above-mentioned problems, and its purpose is to obtain a release type electromagnetic trip device that can give priority to release over reset action when the reset button is continuously pressed Proceed, and set the circuit breaker to the off state.

In order to solve the above-mentioned problems and achieve the objective, the release type electromagnetic trip device of the present invention is a device that is arranged in a circuit breaker. The release type electromagnetic trip device includes: a frame, a lever, and a first bolt Latch; reset button unit; second latch; and electromagnetic solenoid (solenoid). The rod is rotatably supported on the frame, and is pushed in the direction of acting on the opening and closing mechanism of the circuit breaker. The first bolt is rotatably supported on the frame, and is elastically pushed in the direction of engaging with the rod. The reset button unit is movably supported on the frame, and is pushed in a first direction that is a direction protruding from the frame. The second latch is rotatably supported by the reset button unit and is pushed in the direction of engagement with the rod. When the reset button unit protrudes from the frame, it faces the opposite direction to the first direction. When pressed in the second direction, the rod is rotated to engage the rod with the first latch. The electromagnetic solenoid is in the engaged state belonging to the engaged state of the rod and the first latch and the second latch, and the first latch and the second latch are directed by the protrusion of the plunger. Rotate in the direction opposite to the direction in which it is pushed to release the engaged state.

According to the present invention, it is possible to achieve the effect of enabling the release to be performed more preferentially than the resetting action when the reset button is continuously pressed, and the circuit breaker is turned off.

1: Release type electromagnetic trip device

10: Frame

11, 12: side panels

11a, 12a: guide groove

13, 14: connecting pin

15, 16, 18: shaft

20: Rod

21: The first side panel

21a: The first lever engagement part

22: second side panel

22a: The second lever engagement part

22b: The third rod engaging part

23: Link plate

24: protrusion

30: The first latch

31: Jump out of the snap part

32, 43, 44, 52: protrusion

40: Reset button unit

41: Reset button

42: Extension

45: shaft

50: second latch

51: reset the card joint

60: Electromagnetic solenoid

61: Plunger

62: Press plate

70: Transmission mechanism

71: one end

72: The other end

81, 82, 83, 84: extension spring

100: circuit breaker

110: fixed contact

111: movable contact

112: Opening and closing mechanism

Fig. 1 is a diagram showing a configuration example of a circuit breaker in Embodiment 1 of the present invention.

Figure 2 is a diagram for explaining the release type electromagnetic trip device of the first embodiment.

Figure 3 is a side view when viewed from the positive direction of the Y-axis of the release type electromagnetic trip device of the first embodiment.

Figure 4 is a side view when viewed from the negative direction of the Y-axis of the release type electromagnetic trip device of the first embodiment.

Fig. 5 is a side view showing a state in which one side plate of the frame of the release type electromagnetic trip device of Embodiment 1 is removed.

Figure 6 is a side view of the initial state of the release type electromagnetic trip device of embodiment 1 viewed from the positive direction of the Y axis.

Fig. 7 is a side view when the plunger in the release type electromagnetic trip device of Embodiment 1 is viewed from the positive direction of the Y axis.

Fig. 8 is a side view of the release type electromagnetic trip device of the embodiment 1 when viewed from the positive direction of the Y-axis when the operation is on the way.

Figure 9 is a side view of the release type electromagnetic trip device of embodiment 1 when the operation is completed when viewed from the positive direction of the Y axis.

Figure 10 is a side view of the release type electromagnetic tripping device of embodiment 1 when the operation is completed when viewed from the negative direction of the Y axis.

Figure 11 is a side view of the release type electromagnetic trip device of the embodiment 1 in the resetting state when viewed from the positive direction of the Y axis.

Figure 12 is a side view of the release type electromagnetic trip device of the embodiment 1 in the resetting state when viewed from the negative direction of the Y axis.

Figure 13 is a side view of the reset state of the release electromagnetic trip device of embodiment 1 viewed from the positive direction of the Y axis.

Figure 14 is a side view of the reset state of the release type electromagnetic trip device of embodiment 1 viewed from the negative direction of the Y axis.

Figure 15 is a side view of the electromagnetic solenoid operating in the state where the reset button unit of the release type electromagnetic trip device of Embodiment 1 is continuously pressed from the positive direction of the Y axis.

Figure 16 is a side view when the reset button unit of the release type electromagnetic trip device of Embodiment 1 is continuously pressed from the positive direction of the Y axis when the operation is completed.

The release type electromagnetic trip device of the embodiment of the present invention will be described in detail below based on the drawings. In addition, the present invention is not limited to this embodiment.

Implementation Type 1

Fig. 1 is a diagram showing a configuration example of a circuit breaker in Embodiment 1 of the present invention. Figure 2 is a diagram for explaining the release type electromagnetic trip device of the first embodiment. In addition, the left-right direction in Figures 1 and 2 is defined as the X-axis direction, and the vertical direction in Figures 1 and 2 is defined as the Z-axis direction. The direction of intersection is defined as the Y-axis direction. In addition, in other drawings, etc., the XYZ coordinates corresponding to the XYZ coordinate system shown in Figure 2 are also displayed.

As shown in Figure 1, the circuit breaker 100 includes: a fixed contact 110; a movable contact 111; and an opening and closing mechanism 112; the opening and closing mechanism 112 makes the movable contact 111 contact the fixed contact 110 or make it movable The contact 111 is away from the fixed contact 110. The opening/closing mechanism 112 causes the movable contact 111 to contact the fixed contact 110 to turn the circuit breaker 100 into an on state. The movable contact 111 is separated from the fixed contact 110 by the opening and closing mechanism 112, and the circuit breaker 100 is turned off. The circuit breaker 100 is, for example, an air circuit breaker. The circuit breaker 100 can be equipped with a release type electromagnetic trip device 1.

As shown in Figure 2, the release type electromagnetic trip device 1 is provided with: a frame 10; a rod 20 is rotatably supported on the frame 10 and pushed in the direction acting on the opening and closing mechanism 112 of the circuit breaker 100; The first latch 30 is rotatably supported on the frame 10 and is elastically pushed in the direction of engaging with the rod 20.

In addition, the release type electromagnetic trip device 1 is provided with: a reset button unit 40, which is movably supported on the frame 10 and is pushed in the positive direction of the X axis; and a second latch 50, which is rotatably supported In the state where the button unit 40 is reset, it is pushed in a direction to engage with the rod 20. The positive X-axis direction is an example of the first direction of the direction in which the reset button unit 40 protrudes from the frame 10.

A reset button 41 is provided at the front end of the reset button unit 40. The second latch 50 rotates the lever 20 to engage the lever 20 with the first latch 30 when the reset button unit 40 is pressed in the negative direction of the X axis from the state protruding from the frame 10. The negative X-axis direction is an example of the second direction, and is the opposite direction to the first direction belonging to the direction protruding from the frame 10.

In addition, the release type electromagnetic trip device 1 includes an electromagnetic solenoid 60 having a plunger 61 and protruding the plunger 61 by energization. The electromagnetic solenoid 60 rotates the first latch 30 and the second latch 50 by the protrusion of the plunger 61 to release the engagement between the first latch 30 and the second latch 50 and the rod 20.

By releasing the engagement of the first latch 30 and the rod 20, the rod 20 is rotated in the direction acting on the opening and closing mechanism 112 of the circuit breaker 100, so that the circuit breaker 100 is in a cut-off state. also, The reset button unit 40 is pushed in the positive direction of the X-axis, and therefore the second latch 50 is released from the engagement with the rod 20, and moves in the positive direction of the X-axis to protrude from the release type electromagnetic trip device 1.

After that, when the reset button unit 40 is pressed in the negative direction of the X axis, the second latch 50 supported by the reset button unit 40 rotates the lever 20 to engage the lever 20 with the first latch 30 . Furthermore, in a state where the reset button unit 40 is continuously pressed in the negative direction of the X axis, the first latch 30 and the second latch 50 are located at which the engagement with the rod 20 can be released by the protrusion of the plunger 61 The position of the rotation in the closing direction.

Therefore, in a state where the reset button unit 40 is continuously pressed in the negative direction of the X-axis, the protrusion of the plunger 61 releases the engagement of the first latch 30 and the second latch 50 with the rod 20 to make the rod 20 is rotated, and the circuit breaker 100 is turned off. In this way, in the release type electromagnetic trip device 1, the release by the electromagnetic solenoid 60 can be preferentially performed while the reset button 41 is continuously pressed, and the circuit breaker 100 can be turned off.

The configuration of the release type electromagnetic trip device 1 will be specifically described below. Figure 3 is a side view when viewed from the positive direction of the Y-axis of the release type electromagnetic trip device of the first embodiment. Fig. 4 is a side view when viewed from the negative direction of the Y-axis in the first embodiment. Fig. 5 is a side view showing a state in which one side plate of the frame of the release type electromagnetic trip device of Embodiment 1 is removed.

As shown in Figures 3 and 4, the frame 10 is provided with: two side plates 11, 12 facing each other in the Y-axis direction; and connecting pins 13, which connect the two side plates 11, 12 14. As shown in FIG. 3, a guide groove 11a is provided in the side plate 11, and the guide groove 11a guides the reset button unit 40 to move in the X-axis direction. In addition, as shown in FIG. 4, a guide groove 12a is provided in the side plate 12, and the guide groove 12a guides the reset button unit 40 to move in the X-axis direction.

Furthermore, shafts extending in the Y-axis direction are respectively mounted on the side plates 11 and 12 (shaft) 15, 16. The rod 20 is rotatably supported by the side plates 11 and 12 via the shaft 15 with the shaft center of the shaft 15 as the center. The first latch 30 is rotatably supported by the side plates 11 and 12 through the shaft 16 with the shaft center of the shaft 16 as the center.

As shown in Figure 4, the release type electromagnetic trip device 1 is provided with a tension spring 81 which is erected on the base end of the frame 10 and the reset button unit 40, and the reset button unit 40 is made by the tension spring 81 Pushed in the positive direction of the X axis.

In addition, as shown in Figure 5, the release type electromagnetic trip device 1 includes: a tension spring 82, one end of which is mounted to the frame 10, and the other end to the rod 20; and a tension spring 83, one end of which is It is installed on the frame 10 and the other end is installed on the first latch 30. In addition, the release type electromagnetic trip device 1 is provided with a tension spring 84, one end of the tension spring 84 is installed in the reset button unit 40, and the other end is installed in the second latch 50.

The rod 20 is urged in the counterclockwise rotation direction by the extension spring 82. The first latch 30 is urged in the counterclockwise rotation direction by the tension spring 83. The second latch 50 is pushed in the counterclockwise rotation direction by the extension spring 84. Here, the “counterclockwise rotation” refers to the counterclockwise rotation in FIG. 5, and refers to the counterclockwise rotation when the release type electromagnetic trip device 1 is viewed from the positive direction of the Y-axis. Hereinafter, it is assumed that the counterclockwise rotation is the direction when the release type electromagnetic trip device 1 is viewed from the positive direction of the Y axis, and the clockwise rotation is the direction when the release type electromagnetic trip device 1 is viewed from the positive direction of the Y axis for description.

The reset button unit 40 includes: a reset button 41; and an extension portion 42; the extension portion 42 is equipped with the reset button 41 at the front end and extends in the X-axis direction. As shown in FIG. 3, the extension part 42 is formed with the protrusion 43 which protrudes in the positive direction of the Y-axis, and is inserted in the guide groove 11a. Moreover, as shown in FIG. 4, the extension part 42 is formed with the protrusion part 44 which protrudes in the negative direction of the Y-axis, and is inserted in the guide groove 12a. The base end of the extension 42 is for the other end of the tension spring 81 to be installed. Pack. The reset button unit 40 protrudes in the positive direction of the X-axis when the circuit breaker 100 is in the cut-off state, and is manually pushed in the negative direction of the X-axis to reset the release type electromagnetic trip device 1.

As shown in FIG. 5, a shaft 45 extending in the Y-axis direction is attached to the extension 42 of the reset button unit 40. The second latch 50 is rotatably supported by the reset button unit 40 through the shaft 45 around the shaft center of the shaft 45.

Next, the structure of the lever 20, the first latch 30, the reset button unit 40, and the second latch 50 will be explained more specifically. Fig. 6 is a side view of the initial state of the release type electromagnetic trip device of embodiment 1 viewed from the positive direction of the Y axis. 82, 83, 84.

As shown in Figure 6, the rod 20 has: a first side plate 21 and a second side plate 22 facing each other; and a connecting plate 23 connecting the ends of the first side plate 21 and the second side plate 22 in the positive direction of the X axis Department of each other. The first side plate 21 and the second side plate 22 are rotatably supported by the frame 10 through the shaft 15 around the shaft center of the shaft 15.

At one end of the first side plate 21, a first rod engaging portion 21a that engages with the first latch 30 is formed. In addition, at one end of the second side plate 22, a second rod engaging portion 22a and a third rod engaging portion 22b that are engaged with the second latch 50 are formed.

In the first latch 30, a jumper engaging portion 31 that engages with the first rod engaging portion 21a of the rod 20 is formed at one end; at the other end is formed with a connection fixed to the plunger 61 The protruding portion 32 facing the pressing plate 62 at the front end.

The second latch 50 is formed at one end with a reset engaging portion 51 that engages with the second rod engaging portion 22a and the third rod engaging portion 22b of the rod 20; on the other end is formed with The protruding portion 52 opposite to the pressing plate 62 fixed to the front end of the plunger 61.

In addition, the release type electromagnetic trip device 1 has a transmission mechanism 70, and has the function of transmitting the rotational force of the rod 20 to the pressing plate 62. The transmission mechanism 70 is rotatably driven by a shaft 18 extending in the Y-axis direction. Supported by the frame 10.

Next, the operation of the release type electromagnetic trip device 1 will be described. First, the trip operation of the release type electromagnetic trip device 1 will be described. Fig. 7 is a side view of the operation state of the plunger in the release type electromagnetic trip device of embodiment 1 viewed from the positive direction of the Y axis. Fig. 8 is a side view of the release type electromagnetic trip device of the embodiment 1 when viewed from the positive direction of the Y-axis when the operation is on the way. Figure 9 is a side view of the release type electromagnetic trip device of embodiment 1 when the operation is completed when viewed from the positive direction of the Y axis. Figure 10 is a side view of the release type electromagnetic tripping device of embodiment 1 when the operation is completed when viewed from the negative direction of the Y axis. In addition, in FIGS. 7 to 10, for convenience of description, the side plate 11 and the tension springs 81, 82, 83, and 84 are not shown.

When the release type electromagnetic trip device 1 is in the initial state, as shown in Fig. 6, since the trip engaging portion 31 of the first latch 30 is engaged with the first rod engaging portion 21a of the rod 20, Therefore, the lever 20 is restrained from rotating in the counterclockwise rotation direction. In addition, since the reset engagement portion 51 of the second latch 50 is engaged with the second lever engagement portion 22a of the lever 20, the movement of the reset button unit 40 in the positive X-axis direction is suppressed.

When an abnormal current is detected in the circuit breaker 100, the electromagnetic solenoid 60 is energized to supply an exciting current to a coil not shown, and a magnetic flux is generated from the coil. As a result, the plunger 61 protrudes as shown in FIG. 7.

When the plunger 61 protrudes, the protrusion 32 of the first latch 30 is pushed by the pressing plate 62 fixed at the front end of the plunger 61. Therefore, as shown in FIG. 7, the first latch 30 will act on the shaft 16 is the center rotating in a clockwise direction. In addition, due to the protrusion 52 of the second latch 50 being pressed against the plate 62 Pressing, therefore, as shown in FIG. 7, the second latch 50 rotates in a clockwise direction with the shaft 45 as the center.

Therefore, the snap-off engagement portion 31 of the first latch 30 and the first lever engagement portion 21a of the rod 20 are released, and the reset engagement portion 51 of the second latch 50 and the rod 20 are released. The second rod engaging portion 22a is engaged. By releasing the engagement between the jumper engaging portion 31 of the first latch 30 and the first rod engaging portion 21a of the rod member 20, the rod member 20 is moved with the shaft rod 15 as shown in FIGS. 8 and 9 The center rotates in a counterclockwise direction. Therefore, the rod 20 acts on the opening and closing mechanism 112, and the movable contact 111 is separated from the fixed contact 110 by the opening and closing mechanism 112.

In addition, the protruding portion 24 of the rod 20 contacts one end 71 of the transmission mechanism 70 by rotating the rod 20 in the counterclockwise rotation direction, and the one end 71 of the transmission mechanism 70 is centered on the shaft 18 Rotate in the direction of clockwise rotation. Thereby, as shown in FIG. 9, the other end 72 of the transmission mechanism 70 rotates in a clockwise direction, and the other end 72 of the transmission mechanism 70 presses the pressing plate 62. Therefore, the plunger 61 is returned into the electromagnetic solenoid 60, and the electromagnetic solenoid 60 returns to the initial state.

In addition, since the engagement between the reset engagement portion 51 and the second lever engagement portion 22a is released, as shown in FIGS. 9 and 10, the reset button unit 40 is pulled as shown in FIG. 4 The extension spring 81 moves in the positive direction of the X-axis and protrudes from the release type electromagnetic trip device 1. At this time, the protrusions 43, 44 of the reset button unit 40 contact the ends of the guide grooves 11a, 12a, thereby restricting the movement of the reset button unit 40 in the positive X-axis direction.

Next, the resetting of the release type electromagnetic trip device 1 will be described. Figure 11 is a side view of the release type electromagnetic trip device of the embodiment 1 in the resetting state when viewed from the positive direction of the Y axis. Figure 12 is a side view of the release type electromagnetic trip device of the embodiment 1 in the resetting state when viewed from the negative direction of the Y axis. Figure 13 is a view from the positive direction of the Y-axis of the release type electromagnetic trip device of implementation type 1. Set the side view of the completed state. Figure 14 is a side view of the reset state of the release type electromagnetic trip device of embodiment 1 viewed from the negative direction of the Y axis. In addition, in FIGS. 11 to 14, for convenience of description, the side plate 11 and the tension springs 81, 82, 83, and 84 are not shown.

The release type electromagnetic trip device 1 is reset by manually pushing the reset button unit 40 in the negative direction of the X-axis from the state shown in FIGS. 9 and 10. When the reset button unit 40 moves in the negative direction of the X-axis, as shown in Figures 11 and 12, the reset engagement portion 51 of the second latch 50 rotatably supported on the reset button unit 40 is in contact with The third rod engaging portion 22b of the rod 20 is engaged.

Since the reset engagement portion 51 of the second latch 50 moves in the negative direction of the X axis along with the movement of the reset button unit 40 in the negative direction of the X axis, the lever 20 will move toward the X axis along with the reset engagement portion 51 The movement in the negative direction rotates in the clockwise direction. Furthermore, as shown in Figures 13 and 14, the rod 20 is moved to the initial position where the first rod engaging portion 21a of the rod 20 engages with the trip engaging portion 31 of the first latch 30 , And make the release type electromagnetic trip device 1 into the reset state. In this reset state, the engagement of the third rod engaging portion 22b of the rod 20 and the reset engaging portion 51 of the second latch 50 is in a continuous state.

When the state in which the reset button unit 40 is pushed in is released, the reset button unit 40 and the second latch 50 will be pushed back in the positive direction of the X axis due to the spring force of the tension spring 81 shown in Figure 4 However, as shown in FIG. 6, the second latch 50 is engaged with the rod 20 whose rotation is restricted by the engagement with the first latch 30. Therefore, the reset button unit 40 and the second latch 50 are restricted from moving in the positive direction of the X-axis, and maintain their initial positions.

Next, after the release type electromagnetic trip device 1 is reset, the reset button unit 40 is continuously pressed, and in this state, the action of the release type electromagnetic trip device 1 when the electromagnetic solenoid 60 is energized. Figure 15 shows the release type electromagnetic trip device in implementation mode 1 viewed from the positive direction of the Y axis The side view of the electromagnetic solenoid operating state with the reset button being continuously pressed. Figure 16 is a side view when the reset button of the release type electromagnetic trip device of embodiment 1 is continuously pressed from the positive direction of the Y axis when the operation is completed. In addition, in FIGS. 15 and 16, for convenience of description, the side plate 11 and the tension springs 81, 82, 83, and 84 are not shown.

When an abnormal current is detected in the circuit breaker 100, the electromagnetic solenoid 60 is energized. As shown in FIG. 15, the release type electromagnetic trip device 1 is such that when the electromagnetic solenoid 60 is energized from the state where the reset button unit 40 is continuously pressed, the plunger 61 of the electromagnetic solenoid 60 protrudes.

When the plunger 61 protrudes, the protrusion 32 of the first latch 30 will be pushed by the pressing plate 62 fixed at the front end of the plunger 61, so the first latch 30 will move clockwise with the shaft 16 as the center. Rotate in the direction of rotation. In addition, since the protrusion 52 of the second latch 50 is pushed by the pressing plate 62, the second latch 50 rotates in a clockwise direction with the shaft 45 as the center.

Therefore, the snap-off engagement portion 31 of the first latch 30 and the first lever engagement portion 21a of the rod 20 are released, and the reset engagement portion 51 of the second latch 50 and the rod 20 are released. The third rod engaging portion 22b is engaged. As a result, the lever 20 rotates counterclockwise with the shaft 15 as the center as shown in FIG. 16. Therefore, the lever 20 acts on the opening and closing mechanism 112, and the circuit breaker 100 is turned off.

In this way, even in the state where the reset button unit 40 is continuously pressed, the release type electromagnetic trip device 1 can give priority to the release and bring the circuit breaker 100 into the cut-off state. In addition, in the state shown in FIG. 16, since the lever 20 and the second latch 50 are not engaged, if the state of pressing the reset button unit 40 is stopped, the reset button unit 40 will be affected as shown in FIG. 4 The spring force of the tension spring 81 shown moves in the positive direction of the X-axis. Thereby, the release type electromagnetic trip device 1 becomes the state shown in FIG. 9 and FIG. 10.

In summary, the release type electromagnetic trip device 1 of the first embodiment is a release type electromagnetic trip device configured in the circuit breaker 100. The release type electromagnetic trip device 1 includes a frame 10, a rod 20, a first latch 30, a reset button unit 40, a second latch 50, and an electromagnetic solenoid 60. The rod 20 is rotatably supported on the frame 10 and is pushed toward the opening and closing mechanism 112 of the circuit breaker 100. The first latch 30 is rotatably supported on the frame 10 and is elastically pushed in the direction of engaging with the rod 20. The reset button unit 40 is movably supported on the frame 10 and is pushed in the positive direction of the X axis. The second latch 50 is rotatably supported by the reset button unit 40 and is elastically pushed in the direction of engaging with the rod 20. In addition, the second latch 50 rotates the lever 20 to engage the first latch 30 when the reset button unit 40 is pressed in the negative direction of the X axis from the state protruding from the frame 10. The electromagnetic solenoid 60 is in the engaged state belonging to the engaged state of the rod 20 and the first latch 30 and the second latch 50. The protrusion of the plunger 61 makes the first latch 30 and the second latch The latch 50 rotates to release the engaged state. Thereby, the release type electromagnetic trip device 1 can make the release take precedence over the reset action while the reset button 41 is continuously pressed, so that the circuit breaker 100 is turned off.

In addition, the rod 20 includes: a first rod engaging portion 21a engaged with the first latch 30; a second rod engaging portion 22a engaged with the second latch 50; and a second latch 50-engaged third rod engagement portion 22b. The first latch 30 is provided with a jumper engaging portion 31 that engages with the first rod engaging portion 21a. The second latch 50 includes a reset engaging portion 51 that engages with the second rod engaging portion 22a and the third rod engaging portion 22b. Due to the engagement of the first lever engaging portion 21a and the ejection engaging portion 31 of the first latch 30, the rotation of the first lever engaging portion 21a in the direction acting on the opening and closing mechanism 112 is suppressed. Due to the engagement of the second rod engaging portion 22a and the reset engaging portion 51 of the second latch 50, the reset button unit 40 is prevented from moving in the positive direction of the X axis. When the reset button unit 40 is pressed in the negative direction of the X axis from the state protruding from the frame 10, the third lever engaging portion 22b is engaged with the reset engaging portion 51 of the second latch 50, and Make rods 20 rotates so that the rod 20 is engaged with the first latch 30. In this way, the release type electromagnetic trip device 1 is attached to the rod 20 and has a second rod engaging portion 22a and a third rod engaging portion 22b that are engaged with the second latch 50, so that the release can be made relatively easily. The reset action is more prioritized.

The rod 20 includes: a first side plate 21 formed with a second rod engaging portion 22a; a second side plate 22 formed with a third rod engaging portion 22b; and a connecting first side plate 21 and a second side plate 22连接板23。 Link plate 23. Thereby, the arrangement of the rod 20, the first latch 30, and the second latch 50 can be easily performed.

The configuration shown in the above embodiment is an example showing the content of the present invention, and may be combined with other known technologies, and part of the configuration may be omitted or changed without departing from the gist of the present invention.

1: Release type electromagnetic trip device

10: Frame

20: Rod

30: The first latch

40: Reset button unit

41: Reset button

50: second latch

60: Electromagnetic solenoid

61: Plunger

Claims (3)

A release type electromagnetic trip device is arranged in a circuit breaker, and the release type electromagnetic trip device is provided with: frame; The rod is rotatably supported on the aforementioned frame and is pushed in the direction of acting on the opening and closing mechanism of the aforementioned circuit breaker; The first latch is rotatably supported on the aforementioned frame and is elastically pushed in the direction of engaging with the aforementioned rod; The reset button unit is movably supported on the aforementioned frame and is elastically pushed in a first direction that belongs to the direction protruding from the aforementioned frame; The second latch is rotatably supported by the reset button unit, and is pushed in the direction of engaging with the rod. When the reset button unit protrudes from the frame, it belongs to the aforementioned When the second direction opposite to the first direction is pressed, the rod is rotated to engage the rod with the first latch; and The electromagnetic solenoid is in the engaged state belonging to the engaged state of the rod and the first latch and the second latch. The protrusion of the plunger causes the first latch and the second latch to be engaged. The latch rotates in a direction opposite to the direction in which it is pushed, thereby releasing the aforementioned engagement state. According to the release type electromagnetic trip device described in claim 1, wherein the rod is provided with: a first rod engaging portion for engaging with the first latch; and a second rod engaging portion , Is engaged with the aforementioned second latch; and the third rod engaging portion is engaged with the aforementioned second latch; The aforementioned first latch is provided with an engaging portion that engages with the aforementioned first lever engaging portion; The aforementioned second latch is provided with an engaging portion that engages with the aforementioned second rod engaging portion and the aforementioned third rod engaging portion; The release type electromagnetic trip device is composed of: By the engagement of the first lever engaging portion and the engaging portion of the first latch, the rotation of the lever in the direction acting on the opening and closing mechanism is restrained; By the engagement of the second rod engaging portion and the engaging portion of the second latch, the movement of the reset button unit in the first direction is restrained; When the reset button is pressed in the second direction from the state protruding from the frame, the third lever engages with the engagement portion of the second latch to make the lever Rotate so that the rod is engaged with the first latch. According to the release type electromagnetic trip device described in the scope of patent application 2, wherein the rod is provided with: a first side plate formed with the second rod engaging portion; and a second side plate formed with the first The three-bar engaging portion; and the connecting plate connect the first side plate and the second side plate.

Images